All categories

3 years ago

Solve -3x - y = 8 - 7x + 3y = -24

Mathematics

2 answers:

Nookie1986 [14]3 years ago

7 0

The solution is (0,-8)

My name is Ann [436]3 years ago

3 0

Answer:

1.x1=49.5 or x2=-48.5

Step-by-step explanation:

=-3x-y-8=8-8

=-3x-y-8=0 --> a=-3 b=-1 c=-8

solve it using quadratic formula

=-(-1)±√(-1)^2-4(-3)(-8)/2

= 1±√2+96/2

=1±√98/2

=1+98/2 ----> x1=49.5

=1-98/2 -----> x2=-48.5

You might be interested in

Sam uses 2/3 cup of sugar to make cookies. How many cups will Sam use to make five batches. Write your answer in two ways. Impro

frosja888 [35]

Answer:

Improper fraction = 10/3 cups

Mixed fraction = 3 1/3 cups

Step-by-step explanation:

Given;

Sam uses 2/3 cup of sugar to make cookies

Rate = 2/3 cup per batch

To make 5 batches, he would need;

Amount = number of batches × rate per batch

Amount = 5 batches × 2/3 cups per batch

Amount of sugar he would need = 10/3 or 3 1/3 cups

4 0

2 years ago

you purchased 10.75 gallons of gasoline at 3.60/gallon. you also bought a cookie (1.25) and windshield wiper fluid at (4.97). th

Irina-Kira [14]

<span>4% of .65 is .02, so the gum would be a total of $0.67, gas was $26.34, and the windshield wiper fluid is $4.97. Add those all together and you have $31.98, if you give the clerk $20 then you still owe $11.98.</span>

5 0

3 years ago

Please help me !!!!!! I need help

kvv77 [185]

Answer:

y +8 = -4(x -8)

Step-by-step explanation:

You recognize that the given equation is in slope-intercept form:

y = mx + b

with m = 1/4 and b = 5.

A perpendicular line will have a slope that is the negative reciprocal of this value of m, so the desired slope is ...

-1/m = -1/(1/4) = -4

The point-slope form of the equation for a line is ...

y -k = m(x -h) . . . . . for slope m through point (h, k)

Using m=-4 and (h, k) = (8, -8), the point-slope form of the equation for the line you want is ...

y +8 = -4(x -8)

3 0

2 years ago

A sector of a circle has a central angle of 45 . Find the area of the sector if the radius of the circle is 15 cm.

prohojiy [21]

Answer:

A = 28.125 * pi cm^2

A = 88.357 cm^2

Step-by-step explanation:

Area of a sector is 1/2 r^2 theta where theta is in radians

convert 45 degrees to radians

theta = 45 * pi/180 = pi/4

A = 1/2 * 15^2 * pi/4

A =1/2 * 225 * pi/4

A = 28.125 * pi cm^2

A = 88.357 cm^2

6 0

3 years ago

What is 45% written as a fraction

Neko [114]

There are 2 ways you can write this.

You can either do /1 or /100

$\frac{45}{1} or \frac{45}{100}$

The most used is $\frac{45}{100}$

7 0

3 years ago